As someone not really qualified to speak on this, my impression is that the two magical girl shows most casual anime fans would be familiar with are Sailor Moon and Madoka Magica
Edit: Sailor Moon and Cardcaptor Sakura both benefitted from pretty extensive localizations, Sailor Moon being comparable to Dragon Ball Z in terms of success. Madoka came out during the height of the streaming boom, and was basically Evangelion but for girls.
Fujimoto stays winning